<%--
  Created by IntelliJ IDEA.
  User: 28593
  Date: 2022/11/3
  Time: 9:05
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/ex/mex" name="get">
    <input type="text" name="a">
    <input type="submit" value="确定">
</form>
<h1>自定义异常</h1>
</body>
</html>
